This space is already full

Hi, Just purchased Capcut Pro version and am trying to share my default space with 2 collaborators so that they can upload content we want to work on.

However when they try to access via the emailed links they get the message "this space is already full" and are not able to gain access.

I have 0Gb used space of 100Gb available. I have invited only 2 collaborators. Its a fresh account and so I have not managed to do anything as yet. Anyone able to point me in the right direction to solve this?

Many thanks in advance